Def. pub.
method of reducing noise and air pollution



7"" 5 50 W 7 DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheetsof drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 130 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 25, 1969 ll MANUAL CONTROL TO FURNACE OR '"SIRIPPER TOWER a Air and noise pollution caused by the venting of light hydrocarbons to the atmosphere is prevented by adsorbing the hydrocarbons prior to their release. Light hydrocarbons, either aliphatic or aromatic, are passed through an adsorbent bed containing one or more selective solid adsorbents, and only trace amounts of hydrocarbon are vented into the atmosphere. This reduces air pollution caused by light hydrocarbons, as well as noise pollution caused by sudden venting. Two stacks, each having an adsorbent 'bed, are used so that one bed can be regenerated while the other is on stream. The system may be applied to refinery processing units and to off-site equipment such as storage tanks and tank trucks.

arch 25, 1969 F. w. cHuRcH DEF. PUB.

METHOD OF REDUCING NOISE AND AIR POLLUTION Filed April 6, 1967 L. n L 5 'PMANUAL CONTROL I TO FURNACE OR STRIPPER TOWER F. W; CHURCH INVENTOR PATENT ATTORNEY 

